As far as the meta is concerned I am hoping that FFG decides to only remove Personalities and certain thematic cards ever from the "legal" pool of playable rather than whole Arcs. By doing this they will leave a metric ton of playable cards in the deck and that is where this game shines. By being able to make a massive variety of decks it makes it nearly impossible to counter because even the bleeding "optimal" edge gets wider and wider.
Compared to making whole arcs illegal and always keeping the competitive deck pool to a few hundred cards total.